1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6106313bd13991763f17ee7884177b07d3a3d54d2e56254f224fff4351b99956. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0449e1e-4c4a-4fb7-be44-927fb597be59.json and https://artists.proofprofile.net/proofs/artist/b0449e1e-4c4a-4fb7-be44-927fb597be59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b85fd72f385468915ecaec10fdb2c99eca8c30e4d934323a6ce4dd590887d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2020954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623aecd2267dd3d2c10e3f98d53f4d4b56b559305d6250e464dec9da3b0a1824. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ62059377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb59545d1d68b81e9835df688af3c63dae1ab80ad7155293f92f15bb44f9c5b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ32254014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bba37c947d939aa94faa8a5e760ea0b96c742c1c23a05fb8bba5486d4cb4ff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJW2180727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622bdb29735afbe13658b4c1e288c215d56f26526e978663503113aca8c2de5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJW2180728.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc569934d39d739eddb50ae9d85d869fb771b221bce832f7d955ba77118a1f3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJV2168223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ab55c6fcb1c30d88b8158665e8de7d980ea668ae0d4cf33cffd82df0337ea5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX35N2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243fb46dfda2868faa35b31ff9124b335acda2f8ada908452fd636c346cb3ea3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2139388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a249d6a1764d9c876c9f905229153b664d402bbdcc98e182f3cc7d55b8d1f04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZ42048376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6770e8d20db8204a4779292692bdbb65e622113b89095c5734103018c1ce9ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2035930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bf389bed3f46b1576c17bd24d9d8bed93bf3757dce416a33c7ebaf752a229e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIV82492013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddfa9bc509d7b35b4dde940bbf276ba0e63732b7784965769e5ef75fa10e759. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIV82471546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251d75ca33c1a69f29b32ef90ef6e47875b475ce66105246d709225714f4338e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIV82421842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3fcf8fda097de6210cc7faf233d9139efc482045d080116c8c2b992221de31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIV82491904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d5d3cf31ac8ea56b85805a6d04aa2a7ceb99e64e7fc4de9563f0530bb11f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIV82413253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f7461fed9deeb84a29bc2f1dc356aa4959a62d07534b96a6feccc3e058c57. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXIV82498096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bde394fa3c15101580633b668c9549c582573c58e9f200223f343146d8e902. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2273409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca78ced166c44390d777199bbd1e34e7619c69015be0b0675291aef6b24f0855. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2282868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3c377b0b605442748158767005474573441b2d9d31ac117b00737f28accec5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2282876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba48d8e02829c3327ea46f2f3139f2069dec04d9ab64df1bd510171d9c6405f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2282904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28573bbea77c78387561cb6e34b066927b2f7a609844dae55fbacccbb54702c3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2282930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f731c127c0a81e43a89bb167bd006af1e7ef2e3902cd20304a07c6180c0350f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2282936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c1d848d3b5223e7a84e731044b0b96c538dd70c0c89a5cf05cae286418924. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c524fffffcaa2021319008393ae9be24e5556e21d23d699f524bac3798efa3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071267396fc6f7a7cf964a81426920daba3e39dfd40f1e91c83e9e82c6134c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa365111f38bf28fbd8d97114452a480bff027d47d7a7577d6556ac00547fe64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218f1fe3bd03602e54d41176b0bed76c9faa1c0420b1fc3410a7d91f686de346. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50bda2c06c333edefe8baab351693b316d98a362b671f59aebc58fe82b0a57d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbe54bbf099f988e87c86007b222c011ebd1a21f89ae1c07f5c7ea7d84b204e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356e9736fce67ca612489614c842ea8c314a094e47a5cbbd2302ff68f4ec4140. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e4241fa6e4d30364b898b6b79fbc4ca3ae1dcb359e253ab43c71e6e6c483f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2340d749316884951fbe89205aa7dfc40bed7a3c352ccf88addaf7c4551e43cf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRY4R2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92c1be09940b32041c6f9aebaf1ad87f9afe7186a2a973bc47dc80b4c06b67. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92153281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb866d3e465da89d71eb5da9a8bf35c49bf79e1e40c46f432e62085f69a8e15b9. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92153282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce67a0441cb62b6ab893655602d7d344976238d39325b09ede7706a8bfecbd9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMZ92153283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba82dc60fa8d9e6461025616867654fcb0a9921f0482ccd0023b161d5b49511. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRDEP2200470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99559a8d271a84ccd101e9f2d334239a65140a79b8d48667732cb144b2da2dc4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRDEP2200467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b0a6fcada2a894303b82c2a03e4e794977919fa0fc3ac15a59a5684ec48fd9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3Q92309625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87be12883f19fde8417075665b5b46e65d18b87a6073fc77844304b7139128. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2329127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40e8fde899d1aa1a385921f61c81e7bc92fb07e5622ead48c26c8cb9ae1bc72. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS652356201.